Frida U. Ermawati, Yana Taryana, Yaya Sulaeman, Yusuf N. Wijayanto, Nanang Sudrajat, Wisnu A. Adi
Dielectric resonator oscillators (DRO) have been recognized as the basic energy source in microwave telecommunication, radar, and navigation systems. This paper reports fabrication and characterization of structure, microstructure and dielectric properties of (Mg0.8Zn0.2)(Ti0.99Sn0.01)3 ceramics (MZTS hereafter) as a DR, a well as characterization of key parameters of a DRO module, i.e. resonant frequency, output power, bandwidth and phase noise, when the ceramics were used as a resonator in the module. Five-mm diameter solid cylindrical MZTS ceramics were fabricated and sintered at 1100 °C for 4, 6, 8, and 10 h. XRD, SEM–EDS and Network Analyzer were used to characterize the structure, surface morphology, εr and Q factor at 3.3 GHz, and τf of the ceramics. The εr of 17.34–17.48, Q factor of 6464–6510 at 3.3 GHz, and τf of 38–59 ppm/°C measured over 25–70 °C. The DRO key parameters were measured using a Spectrum Analyzer at a transverse electric (TE)01δ resonant mode with 12 Volt dc biasing. The ceramics recorded the resonant frequency at 4.0 GHz which are stable for 1 h with large output power, narrow bandwidth, and low phase noise at 300, 500, 700 kHz, and 3 MHz offset frequencies. The best DRO characteristics was shown by the 8 h ceramic, i.e. the resonant frequency at 4.05 GHz with -6.55 dBm output power, 58.50 kHz bandwidth, and -114.56 dBc/Hz phase noise at 700 kHz offset frequency. With such performance, MZTS ceramics are promising to be used as a silent oscillator in C-band radar systems. © 2023, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Negeri Surabaya, Ketintang Campus, Surabaya, 60231, Indonesia; Research Center for Telecommunication, National Research and Innovation Agency, Bandung, Indonesia; Research Center for Electronics, National Research and Innovation Agency, Serpong, Indonesia; Research Center for Advanced Material, National Research and Innovation Agency, Serpong, Indonesia
